628659222 has 16 divisors (see below), whose sum is σ = 1259417712. Its totient is φ = 209203200.

The previous prime is 628659221. The next prime is 628659223. The reversal of 628659222 is 222956826.

It is an interprime number because it is at equal distance from previous prime (628659221) and next prime (628659223).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628659221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83563 + ... + 90774.

It is an arithmetic number, because the mean of its divisors is an integer number (78713607).

Almost surely, 2^628659222 is an apocalyptic number.

628659222 is an abundant number, since it is smaller than the sum of its proper divisors (630758490).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

628659222 is a wasteful number, since it uses less digits than its factorization.

628659222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174943.

The product of its digits is 207360, while the sum is 42.

The square root of 628659222 is about 25073.0776331905. The cubic root of 628659222 is about 856.6533092707.

It can be divided in two parts, 628659 and 222, that added together give a triangular number (628881 = T₁₁₂₁).

The spelling of 628659222 in words is "six hundred twenty-eight million, six hundred fifty-nine thousand, two hundred twenty-two".